The Catechism in Questions & Answers

502. Is there a connection between Holy Communion and the future “marriage feast” in heaven?

Yes. Holy Communion also points to the future “marriage feast” in heaven. Thus Holy Communion also has an eschatological character.
When He instituted Holy Communion in the circle of the Apostles, Jesus said: “For I say to you, I will not drink of the fruit of the vine until the kingdom of God comes” (Luke 22: 18).
Until the reunion between the bridal congregation and Jesus Christ, the congregation experiences its most intimate fellowship with the Lord in Holy Communion.

Marriage in heaven: see Questions 251., 562. et seq.